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    <title>Document</title>
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      const age = 21
      //   const div = (
          // <div>
          //   {age >= 18 ? <h1>海静喜欢看的电影</h1> : <h1>未成年人看的动画片</h1>}
          // </div>
      //   )
      //   const div = <div>{age > 20 ? <h1>hj,lsp</h1> : null}</div>
      const div = <div>{age > 20 && <h1>hj,lsp</h1>}</div>
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